Vitamins and supplements are often marketed as “natural,” “safe,” and “good for your health.” But natural does not always mean risk-free. Some supplements can stress the liver, affect the kidneys, interact with medications, or become dangerous when taken in high doses.
This does not mean everyone should fear supplements. Many people use them safely when they have a real deficiency or a doctor’s recommendation. The problem starts when people take large amounts, combine several products, follow viral advice online, or use supplements instead of proper medical care.
The FDA explains
